diff --git a/build.sh b/build.sh
index 94753231..a01940cd 100755
--- a/build.sh
+++ b/build.sh
@@ -1465,9 +1465,18 @@ EOF
     fi
 
     mkdir -p "${MOUNT_POINT}/home/clawdie" "${MOUNT_POINT}/etc/profile.d" "${MOUNT_POINT}/etc/skel"
+
+    # Install the canonical npm-global profile snippet (shared with agent-jail-bootstrap.sh).
+    {
+        printf 'NPM_PREFIX="/opt/clawdie/npm-global"\n'
+        cat "${SCRIPT_DIR}/../colibri/packaging/freebsd/clawdie-npm-profile.sh"
+    } > "${MOUNT_POINT}/etc/profile.d/clawdie-npm.sh"
+    chmod 0644 "${MOUNT_POINT}/etc/profile.d/clawdie-npm.sh"
+
+    # ISO-specific environment (PATH, locale, colibri socket). Sources the
+    # shared npm snippet rather than duplicating it.
     cat > "${MOUNT_POINT}/etc/profile.d/clawdie.sh" <<'EOF'
 # Clawdie live operator environment.
-_clawdie_npm_prefix="/opt/clawdie/npm-global"
 _clawdie_base_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
 _clawdie_path_has() {
     case ":${PATH:-}:" in
@@ -1475,10 +1484,6 @@ _clawdie_path_has() {
         *) return 1 ;;
     esac
 }
-export npm_config_prefix="${_clawdie_npm_prefix}"
-export NPM_CONFIG_PREFIX="${_clawdie_npm_prefix}"
-export NPM_CONFIG_UPDATE_NOTIFIER=false
-export NO_UPDATE_NOTIFIER=1
 export LANG="${LANG:-en_US.UTF-8}"
 export LC_ALL="${LC_ALL:-en_US.UTF-8}"
 if [ -z "${PATH:-}" ]; then
@@ -1488,13 +1493,13 @@ else
         _clawdie_path_has "${_clawdie_dir}" || PATH="${PATH}:${_clawdie_dir}"
     done
 fi
-_clawdie_path_has "${_clawdie_npm_prefix}/bin" || PATH="${_clawdie_npm_prefix}/bin:${PATH}"
+# npm-global bin + npm config — canonical snippet shared with agent jails
+[ -r /etc/profile.d/clawdie-npm.sh ] && . /etc/profile.d/clawdie-npm.sh
 export PATH
 
 # Colibri daemon socket — needed for 'colibri' CLI without --socket
 export COLIBRI_DAEMON_SOCKET="/var/run/colibri/colibri.sock"
 
-unset _clawdie_npm_prefix
 unset _clawdie_base_path
 unset -f _clawdie_path_has 2>/dev/null || true
 EOF